CN101934298B - Device for preparing tube bending product by concentric deflection extrusion moulding - Google Patents
Device for preparing tube bending product by concentric deflection extrusion moulding Download PDFInfo
- Publication number
- CN101934298B CN101934298B CN2010101561630A CN201010156163A CN101934298B CN 101934298 B CN101934298 B CN 101934298B CN 2010101561630 A CN2010101561630 A CN 2010101561630A CN 201010156163 A CN201010156163 A CN 201010156163A CN 101934298 B CN101934298 B CN 101934298B
- Authority
- CN
- China
- Prior art keywords
- die
- blank
- punch
- mandrel
- crushing block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Extrusion Of Metal (AREA)
- Forging (AREA)
Abstract
The invention discloses a device for preparing tube bending product by concentric deflection extrusion moulding, comprising a lower mould plate, the upper surface of the lower mould plate is provided with a die holder, the die holder is internally provided with a hollow die, the lower end of the die is provided with a conic discharging hole, corresponding position of the lower mould plate and the lower end of the die is provided with a discharging hole; the die is internally provided with blank and an extrusion block, the extrusion block is arranged right above the blank, the center of the blank and the extrusion block is provided with a center hole, the center hole is inserted with a central spindle; the top of the die holder is provided with a central spindle fixing plate, two punch inlets are arranged at the position corresponding to the extrusion block on the central spindle fixing plate, the two punch inlets are inserted with a punch, the top of the punch is fixedly provided with an upper mould plate, and the upper mould plate is connected with the driving output shaft of an external hydraulic machine. The invention can prepare tube bending product by controlling the width of notch part of the blank, and tube bending product with high quality, uniform thickness, no wrinkle and no distortion on cross section can be rapidly prepared.
Description
Technical field
The present invention relates to the boiler technology field, particularly a kind of device that adopts with one heart material extrusion modling partially to prepare pipe bending part.
Background technology
Along with the application of pipe bending part more and more widely, pipe bending part is used in industry such as Aero-Space, automobile, shipbuilding very extensively, and is also increasingly high to the requirement of the bending quality of tubing and forming technology.The attenuate that has lateral wall in the product that traditional bending pipes method is produced with break, defectives such as the thickening of madial wall, wrinkling and distortion of cross section.
Therefore, press for the preparation facilities of developing a kind of pipe bending part at present, can prepare reliable in quality, wall thickness is even and wrinkle resistant, the distortionless pipe bending part of cross section.
Summary of the invention
In view of this; The purpose of this invention is to provide a kind of device that adopts with one heart material extrusion modling partially to prepare pipe bending part; It can prepare reliable in quality quickly and easily, wall thickness is even and wrinkle resistant, the distortionless pipe bending part of cross section, and preparation technology is simple, can satisfy the extensive generation demand of pipe bending part well; The scale of formation industry is of great practical significance.
For this reason; The invention provides a kind of device that adopts with one heart material extrusion modling partially to prepare pipe bending part; Include lower bolster 14, said masterplate 14 upper surfaces down are provided with die block 12, are provided with the die 16 of hollow in the said die block 12; The lower end of said die 16 has conical discharge port 160, has discharging opening 140 with opposite position place, said die 16 lower end on the said following masterplate 14;
Be provided with blank 17 and crushing block 18 in the said die 16, said crushing block 18 be positioned at blank 17 directly over, the center of said blank 17 and crushing block 18 has centre bore 170, is inserted with mandrel 9 in the said centre bore 170;
Said die block 12 tops are provided with mandrel fixed head 10; Be provided with two punch inlet ports 60 with crushing block 18 corresponding positions on the said mandrel fixed head 10; Be inserted with punch 6 in said two punch inlet ports 60; Said punch 6 tops are set with cope match-plate pattern 1, and said cope match-plate pattern 1 is connected with the driving output shaft of outer liquid press.
Wherein, the said right ends top of masterplate 14 down is respectively arranged with guide pillar 20, and said guide pillar 20 tops are with guide pin bushing 7, and said guide pillar 20 is slidingly fitted with guide pin bushing 7.
Wherein, said guide pillar 20 is little matched in clearance with guide pin bushing 7.
Wherein, said die 16 is made up of first die plate insert 161, second die plate insert 162, and said punch 6 is made up of for the cylinder of watt shape two cross sections.
Wherein, there is not offset distance between the center line of the center line of the center line of the center line of said die 16, punch 6, blank 17 and mandrel 9.
Wherein, the upper end of said mandrel 9 is fixed in the mandrel fixed head 10, and the lower end of said mandrel 9 is positioned at conical discharge port 160 places of said die 16.
Wherein, the shape of said blank 17 and crushing block 18 cross sections, size is identical and all to have cross section be arc breach.
Wherein, the width of the arcuate indentation of said blank 17 and crushing block 18 is 0～d/2, and d is the diameter of mandrel 9.
Wherein, be interference fits between said mandrel fixed head 10 and the die block 12.
Wherein, the temperature of said blank 17 is less than 400 ℃, and the pressure of 1 connection hydraulic press of said cope match-plate pattern is 100t, and the tapering of said conical discharge port 160 is 45 °～60 °.
Visible by above technical scheme provided by the invention; Compared with prior art, a kind of device that adopts with one heart material extrusion modling partially to prepare pipe bending part provided by the invention, easy to assembly being easy to of its mould that has adjusted; Can prepare pipe bending part through the scarce material partial width of control blank; Can prepare reliable in quality quickly and easily, wall thickness is even and wrinkle resistant, the distortionless pipe bending part of cross section, preparation technology is simple, can satisfy the extensive generation demand of pipe bending part well; The scale of formation industry is of great practical significance.
Description of drawings
Fig. 1 is a kind of assembly structure sketch map that adopts with one heart material extrusion modling partially to prepare the device of pipe bending part provided by the invention;
Fig. 2 a, Fig. 2 b be respectively the present invention provide a kind of adopt part of the upper die in the device that with one heart partially material extrusion modling prepares pipe bending part front schematic view, upward view;
Fig. 3 a, Fig. 3 b are respectively a kind of front schematic view, vertical view that adopts part of the lower die in the device that with one heart partially material extrusion modling prepares pipe bending part provided by the invention;
Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d, Fig. 4 e, Fig. 4 f, Fig. 4 g are a kind of schematic perspective view that adopts die that first die plate insert in the device that with one heart partially material extrusion modling prepares pipe bending part, second die plate insert, two die plate inserts be combined to form, blank, crushing block, punch, mandrel provided by the invention;
Among the figure, 1 is cope match-plate pattern, and 2 is first screw, and 3 is punch retainer, and 4 is first straight pin, and 5 is second screw; 6 is punch, and 60 is the punch inlet port, and 7 is guide pin bushing, and 8 is the 3rd screw, and 9 is mandrel; 10 is the mandrel fixed head, and 11 is the 4th screw, and 12 is die block, and 13 is the 5th screw, and 14 is lower bolster; 140 is discharging opening, and 15 is second round pin nail, and 16 is die, and 160 is conical outlet, and 161 is first die plate insert; 162 is second die plate insert, and 17 is blank, and 18 is crushing block, and 19 for ejecting screw, and 20 is guide pillar.
The specific embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with accompanying drawing and embodiment.
Referring to Fig. 1 to Fig. 3, the invention provides a kind of device that adopts with one heart partially material extrusion modling to prepare pipe bending part, include part of the upper die and part of the lower die, said part of the lower die be positioned at said part of the upper die under;
In the present invention, referring to Fig. 2 a, Fig. 2 b, said part of the upper die includes cope match-plate pattern 1, punch retainer 3, punch 6 and guide pin bushing 7, and said cope match-plate pattern 1 is connected with the driving output shaft of outer liquid press;
The bottom surface of said cope match-plate pattern 1 lateral mid-point is set with punch retainer 3, and said punch retainer is set with punch 6 on the 3 lateral mid-point bottom surfaces, and the bottom surface of said punch retainer 3 right ends is set with guide pin bushing 7 respectively;
On concrete the realization, realize fastening through second screw 5 and first straight pin 4 between said cope match-plate pattern 1 bottom surface and the punch retainer 3 and the location, said punch 6 is fixed on the bottom surface of punch retainer 3 through first screw 2;
Referring to Fig. 4 f, said punch 6 is made up of for the cylinder of watt shape two cross sections;
In the present invention, referring to Fig. 3 a, Fig. 3 b, said part of the lower die includes down masterplate 14, die block 12, first die plate insert 161, second die plate insert 162, mandrel fixed head 10, mandrel 9, crushing block 18, blank 17, guide pillar 20;
In the part of the lower die; Said masterplate 14 down is parallel to each other with cope match-plate pattern 1; The right ends top of said down masterplate 14 is respectively arranged with guide pillar 20, and said masterplate 14 middle part upper surfaces down are provided with die block 12, and lateral mid-point are provided with first die plate insert 161, second die plate insert 162 in the said die block 12; Referring to Fig. 4 a, Fig. 4 b, Fig. 4 c; Form the die 16 of hollow by first die plate insert 161, second die plate insert 162, the lower end of said die 16 has conical discharge port 160, has discharging opening 140 with opposite position place, said die 16 lower end (being the said centre position of masterplate 14 down) on the said masterplate 14 down;
Be provided with blank 17 and crushing block 18 in the said die 16; Said crushing block 18 be positioned at blank 17 directly over; Referring to Fig. 4 d, Fig. 4 e, the shape of said blank 17 and crushing block 18 cross sections, size is identical and all to have cross section be arc breach, and the center of said blank 17 and crushing block 18 has centre bore 170; Be inserted with mandrel 9 in the said centre bore 170, the shape of promptly said centre bore 170, size and mandrel 9 corresponding couplings;
In the present invention, the width of the arcuate indentation of said blank 17 and crushing block 18 is 0～d/2, and d is the diameter of mandrel 9;
Said die block 12 tops are provided with mandrel fixed head 10; The left end of said mandrel fixed head 10 is provided with and ejects screw 19; The upper end of said mandrel 9 is fixed in the mandrel fixed head 10; The lower end of said mandrel 9 is positioned at conical discharge port 160 places of said die 16, and said mandrel 9 runs through said blank 17 and crushing block 18;
On concrete the realization, realize fastening and the location through the 5th screw 13 and second round pin nail 15 between said lower bolster 14 and the die block 12, pass through the 4th screw 11 fastening and location between said mandrel fixed head 10 and the die block 12;
Need to prove, in the present invention, be interference fits between said mandrel fixed head 10 and the die block 12, can conveniently dismantle mandrel fixed head 10.
For the present invention; In order the part of the upper die to be installed to the top, part of the lower die; Said guide pin bushing 7 is enclosed within said guide pillar 20 tops, and the guide pin bushing 7 in the said part of the upper die is slidingly fitted with the guide pillar 20 in the said part of the lower die, referring to Fig. 1, Fig. 3 a, Fig. 3 b; Be provided with two punch inlet ports 60 with said punch 6 corresponding positions on the said mandrel fixed head 10; The shape of said two punch inlet ports 60, the size and said punch 6 corresponding couplings, said two punch inlet ports 60 be positioned at said crushing block 18 directly over (promptly being positioned at and crushing block 18 corresponding positions), therefore; Said punch 6 can be inserted in the mandrel fixed head 10 from top to bottom, enters into die 16 then downwards;
On concrete the realization, the guide pin bushing 7 in the said part of the upper die directly is little matched in clearance with the guide pillar 20 in the said part of the lower die, thereby can guarantee that punch 6 accurately slides into the punch inlet port 60 in the mandrel fixed head 10, and the realization mould is accurately located when operation;
Need to prove; Partially expect with one heart that for employing provided by the invention extrusion modling prepares the device of pipe bending part; Divide from function, comprise mould molding part, mould fixing part and targeting part, wherein; Mould molding partly comprises die 16, punch 6, mandrel 9 and crushing block 18; Mould fixing part comprises lower bolster 14, die block 12, punch retainer 3, cope match-plate pattern 1, mandrel fixed head 10 etc., and targeting part comprises mandrel 9, guide pin bushing 7 and guide pillar 20, and part of the upper die of the present invention can move up and down along guide pillar 20 through guide pin bushing 7;
In the present invention, there is not offset distance between the center line of the center line of the center line of the center line of said die 16, punch 6, blank 17 and mandrel 9;
In the present invention, the technological parameter of said metal stock 17 extrusion modlings is: the temperature of said blank 17 for example can be 300 ℃ for less than 400 ℃; The pressure of the hydraulic press that said cope match-plate pattern 1 is connected is 100t; The tapering of the conical discharge port 160 that said die 16 lower ends have is 45 °～60 °;
Operation principle of the present invention is described below:
For the present invention, the mould pressures partially is punch 6 and crushing block 18, and outside hydraulic press carries the cope match-plate pattern 1 of part of the upper die when descending; Punch 6 is and then descending together, and at first punch 6 gets in two punch inlet ports 60 at mandrel fixed head 10 tops, is little matched in clearance between guide pillar 20 and the guide pin bushing 7; Guarantee accurately slipping into of punch 6,, enter into die 16 along with being pressed into of punch 6; At punch 6 with after crushing block 18 in the die 16 contacts; Punch 6 promotes crushing block 18, makes to make it to produce plastic deformation by crushing block 18 extrusion billets 17.
The present invention is through expecting partially that with one heart extrusion forming device is with the metal stock extrusion modling; Exerting pressure when the hydraulic press of outside acts on the punch 6, and blank 17 produces plastic deformation under the effect of punch 6, because blank 17 is a dissymmetrical structure; Has arc breach; Blank 17 is in the process that moves down, and the flow field of blank 17 is inhomogeneous, causes the imbalance of flow of conical discharge port 160 place's metals of die 16.Same horizontal cross-section; Near the flow velocity of the point of blank breach end (abbreviate as lack material end) less than away from the point that lacks the material end; The material that the point that flow velocity is big is extruded at die 16 ports is many; Otherwise then few, this pipe fitting that will inevitably cause generating is crooked to the little end of a flow velocity, and then obtains the bending pipe fitting of wanting required for the present invention.For the present invention, the width of the arcuate indentation (promptly lack material) through control blank 17 can be controlled the flow field of blank 17, thereby lets the pipe bending part final molding of differently curved angle and radius of curvature.
For the present invention, in the extrusion forming device of pipe bending part, the die 16 of mould molding part and punch 6, mandrel 9 center lines are point-blank; Therefore easy to assembly being easy to of mould adjusted; And can prepare pipe bending part through the scarce material partial width of control blank, this apparatus structure is reasonable, technology is simple, and the pipe bending part wall thickness is even and wrinkle resistant, cross section is undistorted; Reliable in quality is with a wide range of applications.
Through specific embodiment concrete utilization of the present invention is described below:
In an embodiment; In order to prepare internal diameter is that 20mm, wall thickness are that 3mm, bending radius are the tubing bend pipe spare of 60mm, and the blank that is adopted is the aluminium alloy of model 5052, and the tapering of the conical discharge port of die is 50 °; The width of the arcuate indentation that blank has is 5mm; The pressure of hydraulic press is 100t, and there is centre bore at the blank center, and temperature is 25 ℃.
The course of work of present embodiment is: the mould equipment that the present invention includes is accomplished; And after being fixed in cope match-plate pattern 1 on the hydraulic press; Blank 17 is put into die plate insert 16; The upper end of mandrel 9 is fixed on the mandrel fixed head 10, and conical discharge port 160 ends that are positioned at die plate insert 16 behind crushing block 18 and the blank 17 are passed in the lower end of mandrel 9; Cope match-plate pattern 1 is accepted the loading of hydraulic press; Act on the crushing block 18 through punch 6; Owing to having arcuate indentation, blank 17 causes expecting inclined to one side cause, as previously mentioned, and the side that the side metal flow that blank 17 volumes are many under same extruding force effect will be few faster than volume; So form the disequilibrium of conical discharge port place 160 place's metal flow; The disequilibrium of this metal flow makes tubing bend, and squeezes out the bool of tubing at last from discharging opening 140, the promptly final acquisition pipe bending part of wanting required for the present invention.
In sum; Compared with prior art, the invention provides a kind of device that adopts with one heart material extrusion modling partially to prepare pipe bending part, easy to assembly being easy to of its mould that has adjusted; Can prepare pipe bending part through the scarce material partial width of control blank; Can prepare reliable in quality quickly and easily, wall thickness is even and wrinkle resistant, the distortionless pipe bending part of cross section, preparation technology is simple, can satisfy the extensive generation demand of pipe bending part well; The scale of formation industry is of great practical significance.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (8)
1. an employing expects partially that with one heart extrusion modling prepares the device of pipe bending part; It is characterized in that; Include lower bolster (14), said masterplate (14) upper surface down is provided with die block (12), is provided with the die (16) of hollow in the said die block (12); The lower end of said die (16) has conical discharge port (160), and said masterplate (14) is down gone up with opposite position place, said die (16) lower end and had discharging opening (140);
Be provided with blank (17) and crushing block (18) in the said die (16), said crushing block (18) be positioned at blank (17) directly over, the center of said blank (17) and crushing block (18) has centre bore (170), is inserted with mandrel (9) in the said centre bore 170;
Said die block (12) top is provided with mandrel fixed head (10); Said mandrel fixed head (10) is gone up and the corresponding position of crushing block (18) is provided with two punch inlet ports (60); Be inserted with punch (6) in said two punch inlet ports (60); Said punch (6) top is set with cope match-plate pattern (1), and said cope match-plate pattern (1) is connected with the driving output shaft of outer liquid press;
There is not offset distance between the center line of the center line of the center line of the center line of said die (16), punch (6), blank (17) and mandrel (9);
The shape of said blank (17) and crushing block (18) cross section, size is identical and all to have cross section be arc breach.
2. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that the said right ends top of masterplate (14) down is respectively arranged with guide pillar (20), and said guide pillar (20) top is with guide pin bushing (7), and said guide pillar (20) is slidingly fitted with guide pin bushing (7).
3. inclined to one side with one heart material extrusion forming device as claimed in claim 2 is characterized in that said guide pillar (20) is little matched in clearance with guide pin bushing (7).
4. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that said die (16) is made up of first die plate insert (161), second die plate insert (162), and said punch (6) is made up of for the cylinder of watt shape two cross sections.
5. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that the upper end of said mandrel (9) is fixed in the mandrel fixed head (10), and the lower end of said mandrel (9) is positioned at the conical discharge port (160) of said die (16) and locates.
6. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that the width of the arcuate indentation of said blank (17) and crushing block (18) is 0～d/2, and d is the diameter of mandrel (9).
7. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that, is interference fits between said mandrel fixed head (10) and the die block (12).
8. inclined to one side with one heart material extrusion forming device as claimed in claim 1 is characterized in that the temperature of said blank (17) is less than 400 ℃, and the pressure of said cope match-plate pattern (1) institute connection hydraulic press is 100t, and the tapering of said conical discharge port (160) is 45 °～60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101561630A CN101934298B (en) | 2010-04-27 | 2010-04-27 | Device for preparing tube bending product by concentric deflection extrusion moulding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101561630A CN101934298B (en) | 2010-04-27 | 2010-04-27 | Device for preparing tube bending product by concentric deflection extrusion moulding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101934298A CN101934298A (en) | 2011-01-05 |
| CN101934298B true CN101934298B (en) | 2012-07-04 |
Family
ID=43388006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101561630A Expired - Fee Related CN101934298B (en) | 2010-04-27 | 2010-04-27 | Device for preparing tube bending product by concentric deflection extrusion moulding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101934298B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102335707B (en) * | 2011-08-19 | 2014-08-27 | 江苏森威精锻有限公司 | Large-diameter die with requirements on positions of inner ring and outer ring and processing method thereof |
| CN103317020A (en) * | 2013-06-23 | 2013-09-25 | 苏州腾行精密模具有限公司 | Movable charge cavity mold |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4157654A (en) * | 1978-01-03 | 1979-06-12 | The Babcock & Wilcox Company | Tube forming process |
| DE2855449A1 (en) * | 1978-12-21 | 1980-07-03 | Vitkovice Zelezarny | Extrusion of pipe bends and elbows - by means of die with eccentric hole and eccentrically mounted mandrel |
| CN101693262A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting eccentric extrusion forming |
| CN201644539U (en) * | 2010-04-27 | 2010-11-24 | 天津理工大学 | Concentric deflection extrusion molding device |
-
2010
- 2010-04-27 CN CN2010101561630A patent/CN101934298B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4157654A (en) * | 1978-01-03 | 1979-06-12 | The Babcock & Wilcox Company | Tube forming process |
| DE2855449A1 (en) * | 1978-12-21 | 1980-07-03 | Vitkovice Zelezarny | Extrusion of pipe bends and elbows - by means of die with eccentric hole and eccentrically mounted mandrel |
| CN101693262A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting eccentric extrusion forming |
| CN201644539U (en) * | 2010-04-27 | 2010-11-24 | 天津理工大学 | Concentric deflection extrusion molding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101934298A (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693262A (en) | Method for preparing pipe bending part by adopting eccentric extrusion forming | |
| CN104550289B (en) | The method of extrusion forming curvature of space tubing of more punch-pin | |
| CN101224475B (en) | Spiral flat tube chilling press | |
| CN102151709A (en) | Method for differentially extruding and forming pipe fittings arbitrarily bent on plane by adopting double convex dies | |
| CN102107230B (en) | Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies | |
| CN101693263B (en) | Method for preparing pipe bending part by adopting flexible extrusion forming | |
| CN204953710U (en) | Pipe fitting throat mold processing | |
| CN101934298B (en) | Device for preparing tube bending product by concentric deflection extrusion moulding | |
| CN105149488B (en) | Automatic ink spraying device for infrared punching die forging and ink spraying method thereof | |
| CN201644539U (en) | Concentric deflection extrusion molding device | |
| CN106077118A (en) | The continuous processing device of a kind of ultrafine grain metal section bar and processing method | |
| CN205183358U (en) | Toper channels into tube drawing mould | |
| CN205074366U (en) | Pipe -reduction mold | |
| CN204338600U (en) | Conical pipe cold-extrusion shaping device | |
| CN206825913U (en) | A kind of plastic tube bending and enlarging apparatus | |
| CN203400951U (en) | Ultra-wide aluminum alloy board extruding mold | |
| CN102107229B (en) | Method and device for molding small-angle bent pipe fitting by taking different curved surfaces as extrusion surfaces | |
| CN206199900U (en) | Flow controls the mould of formula one-shot forming various dimensions elbow member | |
| CN203030656U (en) | Reducing pipe expansion drawing forming device | |
| CN101428310B (en) | Flexible core of flexible tube terminal mould | |
| CN201505677U (en) | Eccentric extrusion forming device for tubing bent piece | |
| CN202963208U (en) | Stainless steel pipe shaping mold and stainless steel pipe integral shaping tool | |
| CN208758348U (en) | A kind of inner die for cold-drawn process for eliminating steel pipe inside spin | |
| CN201505676U (en) | Flexible extrusion molding device for tubing bent piece | |
| CN202037198U (en) | Double-convex-mold differential extrusion molding device for preparing pipe bending piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20130427 |